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Why benzene does not undergo electrophilic addition reaction?

Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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Consider the following compounds

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Hyperconjugation occurs in:
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The correct order of nucleophilicity is
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A solution of (-)1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of :
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Arrange the following compounds in order of decreasing acidity :
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Which among the following is a set of nucleophiles?
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In pyrrole, the electron density is maximum on

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The order of stability of the following carbocations:
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The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, due to 
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The indicated atom is not a nucleophilic site in

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Given below are two statements :

Statement I : C2H5OH and AgCN both can generate nucleophile.

Statement II : KCN and AgCN both will generate nitrile nucleophile with all reaction conditions.

Choose the most appropriate option :

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In which of the following molecules, all atoms are coplanar?
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In electrophilic aromatic substitution reactions of chlorobenzene, the ortho/para-directing ability of chlorine is due to its
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The correct sequence of reagents for the following conversion will be

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In which of the following compounds, the C-Cl bond ionization shall give most stable carbonium ion?
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Which of the following molecules is least resonance stabilized?
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The correct statement regarding electrophiles is:

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The stability of carbocations

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follows the order
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What will be the correct nucleophilicity order in protic or aprotic solvents?
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The increasing order of nucleophilicity of the following nucleophiles is;
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Which of the following statements is not correct for a nucleophile?